Fig. 4.
Immortalization of primary murine myeloid progenitors by MLL-ELL.
(A) Schematic representation of retroviral transduction protocol. (B) Colonies generated per 104 infected BM cells were determined in first-, second-, and third-round cultures for MLL5′ and MLL-ELL constructs. First-round bars represent G418Rcolonies. Bars represent the mean ± SD for 3 experiments.